Certificate validity checking

a certificate and validity technology, applied in the field of certificate validity checking, can solve the problems of unauthorized terminal devices being inserted into the local network, failing to obtain public keys, and affecting the validity of certificates, etc., and achieving the effect of preventing the certificate from being disabled sooner
US20070186111A1Inactive Publication Date: 2007-08-09THOMSON LICENSING SA
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
THOMSON LICENSING SA
Publication Date
2007-08-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for checking a validity of a certificate containing a key associated to a network device in a network, comprises receiving at the network an encrypted content and a validity index associated to the content. The validity of the certificate is evaluated from a time index contained within the certificate, the time index having a value corresponding to a time of issue of the certificate, and from the validity index associated to the encrypted content.
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Description

BACKGROUND OF INVENTION

[0001] 1. Field of the Invention

[0002] The invention relates generally to the field of secure communication networks.

[0003] 2. Background Art

[0004] Data exchanged through a network may be copied. Hardware manufacturers hence need to protect the exchanged data and to manage permissions or prohibitions to copy the data. Typically, a Public Key Infrastructure (PKI) is provided: a trusted third party, e.g. a certifying authority, generates private / public keys pairs. The private / public keys pairs are involved in data exchanges between network devices of the network.

[0005] The trusted third party signs certificates that contain the public key of the private / public keys pair. Typically, each network device of the network is associated to a determined certificate. The determined certificate may for example be stored within a portable security module of the associated network device. The certificates allow to insure that the data is exchanged between network devic...

Claims

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